Every founder I know has the same problem: you know you should track your metrics, but pulling the numbers together takes forever.

You open a spreadsheet. You Google "what's a good LTV:CAC ratio." You find three blog posts with three different answers. You close the spreadsheet. Sound familiar?

I built Niche AI Tool because I was tired of this cycle. Instead of writing another opinion blog post, I built free calculators that actually solve the problem. All of them run 100% in your browser — no sign-up, no data collection, no tracking.

Here's the full collection.

Revenue & Metrics Calculators

The core stuff. If you only use three tools from this list, make it these three.

SaaS Revenue Calculator — MRR, ARR, runway, growth rate. The starting point for any SaaS metrics check.

MRR Growth Calculator — Month-over-month growth with CAGR. See if your growth is accelerating or decelerating.

CAC Calculator — Customer acquisition cost with payback period.…